Overview
This guide provides essential installation instructions for Lennox economizers and outdoor air hoods designed for use with LG, LC, LH, and LD series HVAC units (models 024, 036, 048, 060, 072, 074). It details the components, application suitability, and step-by-step procedures for both downflow and horizontal airflow configurations.
Key Components & Application
The economizer system utilizes outdoor air for free cooling when environmental conditions are favorable, contributing to energy efficiency. The package typically includes an economizer damper assembly, a gravity exhaust damper (GED) assembly, a combination hood kit, and a filter kit. It is designed to integrate with specific Lennox unit controllers (M2, M3, M4) and supports various free cooling modes, including temperature and enthalpy-based control, with considerations for California Title 24 compliance.
Installation Procedures
Installation involves careful handling of components and adherence to safety warnings. Procedures cover:
- Unpacking and identifying all parts.
- Preparing the unit by removing existing panels or components as needed.
- Installing the economizer damper assembly and associated sensors.
- Attaching outdoor air hoods and filter brackets.
- Connecting wiring to the unit controller.
- Specific steps for downflow and horizontal airflow applications, including the use of optional gravity exhaust kits.
Proper setup of the unit controller is crucial for enabling and configuring free cooling modes based on site-specific requirements and climate data.
Safety First
WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause property damage, personal injury, or loss of life. Installation and service must be performed by a licensed professional HVAC installer or equivalent service agency.
CAUTION: Handle equipment with care to avoid injury from sharp sheet metal edges.
